Answer: Option (C) is correct.
Step-by-step explanation:
Federalism is considered as the compound mode of state, collaborating a general government with its regional entities in political system. Its unique feature, demonstrated in example of contemporary federalism by US under its Constitution(1787), it is considered to be a relationship between two levels of state established. Therefore it can be defined as a type of government where there is a segregation of power between each level.